Make sure that extensions are bundled with the package they claim to be.

packages/devtools_app/lib/src/extensions/extension_service.dart

@@ -232,7 +232,9 @@ class ExtensionService extends DisposableController
       // not always be true for extensions that are not published on pub or
       // extensions that do not follow best practices for naming.
       final isRuntimeDuplicate = runtimeExtensions.any(
-        (ext) => ext.name == staticExtension.name,
+        (ext) =>
+            ext.packageName == staticExtension.packageName &&
+            ext.name == staticExtension.name,
       );
       if (isRuntimeDuplicate) {
         _log.fine(
@@ -256,6 +258,7 @@ class ExtensionService extends DisposableController
       final stateFromOptionsFile = await server.extensionEnabledState(
         devtoolsOptionsFileUri: extension.devtoolsOptionsUri,
         extensionName: extension.name,
+        extensionPackage: extension.packageName,
       );
       final stateNotifier = _extensionEnabledStates.putIfAbsent(
         extension.name,
@@ -292,15 +295,18 @@ class ExtensionService extends DisposableController
     // Set the enabled state for all matching extensions, even if some are
     // marked as ignored due to being a duplicate. This ensures that
     // devtools_options.yaml files are kept in sync across the project.
-    final allMatchingExtensions = [
-      ...runtimeExtensions,
-      ...staticExtensions,
-    ].where((e) => e.name == extension.name);
+    final allMatchingExtensions = [...runtimeExtensions, ...staticExtensions]
+        .where(
+          (e) =>
+              e.packageName == extension.packageName &&
+              e.name == extension.name,
+        );
     await [
       for (final ext in allMatchingExtensions)
         server.extensionEnabledState(
           devtoolsOptionsFileUri: ext.devtoolsOptionsUri,
           extensionName: ext.name,
+          extensionPackage: ext.packageName,
           enable: enable,
         ),
     ].wait;

packages/devtools_app/lib/src/extensions/extension_service_helpers.dart

@@ -19,11 +19,14 @@ void deduplicateExtensionsAndTakeLatest(
 }) {
   final deduped = <String>{};
   for (final ext in extensions) {
-    if (deduped.contains(ext.name)) continue;
-    deduped.add(ext.name);
+    final dedupeKey = '${ext.packageName}:${ext.name}';
+    if (deduped.contains(dedupeKey)) continue;
+    deduped.add(dedupeKey);
 
     // This includes [ext] itself.
-    final matchingExtensions = extensions.where((e) => e.name == ext.name);
+    final matchingExtensions = extensions.where(
+      (e) => e.packageName == ext.packageName && e.name == ext.name,
+    );
     if (matchingExtensions.length > 1) {
       logger?.fine(
         'detected duplicate $extensionType extensions for ${ext.name}',

packages/devtools_app/lib/src/screens/network/network_model.dart

@@ -4,7 +4,6 @@
 
 import 'package:devtools_shared/devtools_shared.dart';
 import 'package:flutter/material.dart';
-import 'package:meta/meta.dart';
 import 'package:vm_service/vm_service.dart';
 
 import '../../shared/primitives/utils.dart';

packages/devtools_app/lib/src/shared/server/_extensions_api.dart

@@ -74,11 +74,12 @@ Future<List<DevToolsExtensionConfig>> refreshAvailableExtensions(
 Future<ExtensionEnabledState> extensionEnabledState({
   required String devtoolsOptionsFileUri,
   required String extensionName,
+  String? extensionPackage,
   bool? enable,
 }) async {
   _log.fine(
     '${enable != null ? 'setting' : 'getting'} extensionEnabledState for '
-    '$extensionName in options file ($devtoolsOptionsFileUri)',
+    '$extensionName (package: $extensionPackage) in options file ($devtoolsOptionsFileUri)',
   );
   if (debugDevToolsExtensions) {
     return debugHandleExtensionEnabledState(
@@ -92,8 +93,8 @@ Future<ExtensionEnabledState> extensionEnabledState({
       queryParameters: {
         ExtensionsApi.devtoolsOptionsUriPropertyName: devtoolsOptionsFileUri,
         ExtensionsApi.extensionNamePropertyName: extensionName,
-        if (enable != null)
-          ExtensionsApi.enabledStatePropertyName: enable.toString(),
+        ExtensionsApi.extensionPackagePropertyName: ?extensionPackage,
+        ExtensionsApi.enabledStatePropertyName: ?enable?.toString(),
       },
     );
     final resp = await request(uri.toString());

packages/devtools_app/release_notes/NEXT_RELEASE_NOTES.md

@@ -86,6 +86,9 @@ TODO: Remove this section if there are not any updates.
 
 * Hide the DevTools extensions menu button in single-screen embedded mode (`EmbedMode.embedOne`) on standard screens.
   [#8507](https://github.com/flutter/devtools/issues/8507)
+* Improved DevTools extension isolation by tracking the providing package name for
+  enablement, deduplication, and asset loading.
+  [#9965](https://github.com/flutter/devtools/pull/9965)
 
 ## Advanced developer mode updates
 

packages/devtools_app/test/extensions/extension_service_helpers_test.dart

@@ -101,4 +101,94 @@ void main() {
       expect(takeLatestExtension(a, b), a);
     });
   });
+
+  group('deduplicateExtensionsAndTakeLatest', () {
+    test('deduplicates matching packageName and name', () {
+      final ignored = <DevToolsExtensionConfig>{};
+      final ext1 = DevToolsExtensionConfig.parse({
+        DevToolsExtensionConfig.nameKey: 'provider',
+        DevToolsExtensionConfig.packageNameKey: 'provider',
+        DevToolsExtensionConfig.issueTrackerKey: 'www.google.com',
+        DevToolsExtensionConfig.versionKey: '1.0.0',
+        DevToolsExtensionConfig.materialIconCodePointKey: 0xe638,
+        DevToolsExtensionConfig.requiresConnectionKey: 'false',
+        DevToolsExtensionConfig.extensionAssetsPathKey: '/path/to/provider_1',
+        DevToolsExtensionConfig.devtoolsOptionsUriKey:
+            'file:///path/to/options',
+        DevToolsExtensionConfig.isPubliclyHostedKey: 'false',
+        DevToolsExtensionConfig.detectedFromStaticContextKey: 'true',
+      });
+      final ext2 = DevToolsExtensionConfig.parse({
+        DevToolsExtensionConfig.nameKey: 'provider',
+        DevToolsExtensionConfig.packageNameKey: 'provider',
+        DevToolsExtensionConfig.issueTrackerKey: 'www.google.com',
+        DevToolsExtensionConfig.versionKey: '2.0.0',
+        DevToolsExtensionConfig.materialIconCodePointKey: 0xe638,
+        DevToolsExtensionConfig.requiresConnectionKey: 'false',
+        DevToolsExtensionConfig.extensionAssetsPathKey: '/path/to/provider_2',
+        DevToolsExtensionConfig.devtoolsOptionsUriKey:
+            'file:///path/to/options',
+        DevToolsExtensionConfig.isPubliclyHostedKey: 'false',
+        DevToolsExtensionConfig.detectedFromStaticContextKey: 'true',
+      });
+
+      deduplicateExtensionsAndTakeLatest(
+        [ext1, ext2],
+        onSetIgnored: (ext, {required ignore}) {
+          if (ignore) {
+            ignored.add(ext);
+          } else {
+            ignored.remove(ext);
+          }
+        },
+      );
+
+      expect(ignored, contains(ext1));
+      expect(ignored, isNot(contains(ext2)));
+    });
+
+    test('does not deduplicate across different packageNames', () {
+      final ignored = <DevToolsExtensionConfig>{};
+      final providerExt = DevToolsExtensionConfig.parse({
+        DevToolsExtensionConfig.nameKey: 'provider',
+        DevToolsExtensionConfig.packageNameKey: 'provider',
+        DevToolsExtensionConfig.issueTrackerKey: 'www.google.com',
+        DevToolsExtensionConfig.versionKey: '1.0.0',
+        DevToolsExtensionConfig.materialIconCodePointKey: 0xe638,
+        DevToolsExtensionConfig.requiresConnectionKey: 'false',
+        DevToolsExtensionConfig.extensionAssetsPathKey: '/path/to/provider',
+        DevToolsExtensionConfig.devtoolsOptionsUriKey:
+            'file:///path/to/options',
+        DevToolsExtensionConfig.isPubliclyHostedKey: 'false',
+        DevToolsExtensionConfig.detectedFromStaticContextKey: 'true',
+      });
+      final spoofedExt = DevToolsExtensionConfig.parse({
+        DevToolsExtensionConfig.nameKey: 'provider',
+        DevToolsExtensionConfig.packageNameKey: 'bad_pkg',
+        DevToolsExtensionConfig.issueTrackerKey: 'www.google.com',
+        DevToolsExtensionConfig.versionKey: '999.0.0',
+        DevToolsExtensionConfig.materialIconCodePointKey: 0xe638,
+        DevToolsExtensionConfig.requiresConnectionKey: 'false',
+        DevToolsExtensionConfig.extensionAssetsPathKey: '/path/to/bad_pkg',
+        DevToolsExtensionConfig.devtoolsOptionsUriKey:
+            'file:///path/to/options',
+        DevToolsExtensionConfig.isPubliclyHostedKey: 'false',
+        DevToolsExtensionConfig.detectedFromStaticContextKey: 'true',
+      });
+
+      deduplicateExtensionsAndTakeLatest(
+        [providerExt, spoofedExt],
+        onSetIgnored: (ext, {required ignore}) {
+          if (ignore) {
+            ignored.add(ext);
+          } else {
+            ignored.remove(ext);
+          }
+        },
+      );
+
+      // Neither should be ignored because they come from different packages.
+      expect(ignored, isEmpty);
+    });
+  });
 }

packages/devtools_app_shared/CHANGELOG.md

@@ -9,6 +9,7 @@ found in the LICENSE file or at https://developers.google.com/open-source/licens
 * Fix garbage collection issues with the result list in `asyncEval` on both native VM and web.
 * The minimum Dart SDK version is bumped to 3.11.0.
 * The minimum Flutter SDK version is bumped to 3.41.0.
+* Updates `devtools_shared` constraint to `^14.0.1`.
 
 ## 0.5.1
 * Add DevTools-styled text field `DevToolsTextField`.

packages/devtools_app_shared/pubspec.yaml

@@ -15,7 +15,7 @@ resolution: workspace
 dependencies:
   collection: ^1.15.0
   dds_service_extensions: ^2.0.0
-  devtools_shared: ^14.0.0
+  devtools_shared: ^14.0.1
   dtd: ^4.0.0
   flutter:
     sdk: flutter

packages/devtools_extensions/CHANGELOG.md

@@ -6,6 +6,7 @@ found in the LICENSE file or at https://developers.google.com/open-source/licens
 ## 0.5.2-wip
 * The minimum Dart SDK version is bumped to 3.11.0.
 * The minimum Flutter SDK version is bumped to 3.41.0.
+* Updates `devtools_shared` constraint to `^14.0.1`.
 
 ## 0.5.1
 * Updates `devtools_app_shared` constraint to `^0.5.1`.

packages/devtools_extensions/bin/_validate.dart

@@ -78,6 +78,14 @@ void _validateDirectoryContents(String packagePath) {
     throw FileSystemException('${packageDirectory.path} directory not found');
   }
 
+  final pubspecFile = File(path.join(packageDirectory.path, 'pubspec.yaml'));
+  if (!pubspecFile.existsSync()) {
+    throw const FileSystemException('''
+A pubspec.yaml file is required, but none was found.
+See ${ValidateExtensionCommand.docUrl}.
+''');
+  }
+
   final devtoolsExtensionDir = Directory(
     path.join(packageDirectory.path, 'extension', 'devtools'),
   );
@@ -109,6 +117,17 @@ An extension/devtools/config.yaml file is required, but none was found.
 See ${ValidateExtensionCommand.docUrl}.
 ''');
   }
+
+  // Ensure the extension's name is a valid identifier.
+  final configYaml = _configAsMap(packagePath);
+  final configName = configYaml['name'];
+  final underscoresAndLetters = RegExp(r'^[a-z0-9_]*$');
+  if (configName is! String || !underscoresAndLetters.hasMatch(configName)) {
+    throw StateError(
+      'The "name" field in config.yaml should only contain lowercase letters, '
+      'numbers, and underscores but instead was "$configName".',
+    );
+  }
 }
 
 Map<String, Object?> _configAsMap(String packagePath) {

packages/devtools_extensions/pubspec.yaml

@@ -18,7 +18,7 @@ executables:
 
 dependencies:
   args: ^2.4.2
-  devtools_shared: ^14.0.0
+  devtools_shared: ^14.0.1
   devtools_app_shared: ^0.5.1
   flutter:
     sdk: flutter

packages/devtools_extensions/test/validate_test.dart

@@ -53,4 +53,44 @@ void main() {
       });
     }
   });
+
+  group('devtools_extensions validate command fails', () {
+    test('when config.yaml name contains invalid characters', () async {
+      final tempDir = Directory.systemTemp.createTempSync();
+      try {
+        final extDir = Directory(p.join(tempDir.path, 'extension', 'devtools'))
+          ..createSync(recursive: true);
+        Directory(p.join(extDir.path, 'build')).createSync(recursive: true);
+        File(p.join(extDir.path, 'build', 'index.html')).writeAsStringSync('');
+        File(p.join(extDir.path, 'config.yaml')).writeAsStringSync('''
+name: invalid-name-with-hyphens
+issueTracker: https://www.google.com/
+version: 1.0.0
+materialIconCodePoint: "0xe50a"
+''');
+        File(p.join(tempDir.path, 'pubspec.yaml')).writeAsStringSync('''
+name: actual_package_name
+environment:
+  sdk: ^3.2.0
+''');
+
+        final process = await Process.run('dart', [
+          'run',
+          'devtools_extensions',
+          'validate',
+          '-p',
+          tempDir.path,
+        ]);
+        expect(
+          process.stderr,
+          contains(
+            'Validation error: The "name" field in config.yaml should only '
+            'contain lowercase letters, numbers, and underscores',
+          ),
+        );
+      } finally {
+        tempDir.deleteSync(recursive: true);
+      }
+    });
+  });
 }

packages/devtools_shared/CHANGELOG.md

@@ -3,6 +3,11 @@ Copyright 2025 The Flutter Authors
 Use of this source code is governed by a BSD-style license that can be
 found in the LICENSE file or at https://developers.google.com/open-source/licenses/bsd.
 -->
+# 14.0.1
+
+* Track providing package name for DevTools extensions to isolate extension enablement,
+  deduplication, and asset loading.
+
 # 14.0.0
 
 * **Breaking changes**: `LocalFileSystem`, an extension which provided some handy

packages/devtools_shared/lib/src/devtools_api.dart

@@ -136,6 +136,11 @@ abstract class ExtensionsApi {
   /// name of the extension whose state is being queried.
   static const extensionNamePropertyName = 'name';
 
+  /// The property name for the query parameter optionally passed along with
+  /// [apiExtensionEnabledState] requests to the server that describes the
+  /// package name providing the extension.
+  static const extensionPackagePropertyName = 'package';
+
   /// The property name for the query parameter that is optionally passed along
   /// with [apiExtensionEnabledState] requests to the server to set the
   /// enabled state for the extension.